Damping structure and refrigerator

Abstract

The application discloses a damping structure and a refrigerator, which comprises a bottom plate, a limiting sleeve arranged on the bottom plate, a foot pad connected with a compressor foot, installed in the limiting sleeve of the bottom plate and leaving a gap between the periphery and the limiting sleeve, a hot melt material filled in the gap between the foot pad and the limiting sleeve, capable of changing the displacement of the foot pad after being melted by heating, a fastener installed on the bottom plate and used for preventing the foot pad from being taken out of the limiting sleeve, and a heating device used for heating the filling medium to change the state of the filling medium. The application sets the filling medium in the gap between the foot pad and the limiting sleeve of the bottom plate, and the filling medium is melted or softened from solid state after being heated, so that the foot pad can move in the gap between the foot pad and the limiting sleeve, the noise caused by the collision between metals is eliminated, the vibration energy is weakened from the source, and the noise of the whole refrigerator is reduced. In the process of carrying and transporting the refrigerator, the heating device is closed, so that the filling medium is in the solidification state, and the activity space of the compressor foot pad is limited.

Description

Technical Field

[0001] This invention relates to the field of refrigerator vibration reduction technology, specifically to a vibration reduction structure and a refrigerator. Background Technology

[0002] The freezing temperature of ordinary refrigerators is generally between -18℃ and -24℃, and some refrigerators can reach as low as -33℃ to -40℃ by increasing the compressor speed. However, the lower the required temperature, the higher the compressor speed needs to be. Under different operating conditions, refrigerators need to meet the requirements of maintaining temperature at low frequencies and cooling and temperature pulling at high frequencies. Especially at high speeds, the compressor is prone to instability and generating greater vibration. These vibrations are transmitted to the entire refrigerator body through the chassis and other transmission paths. Because refrigerators use foam insulation technology, the vibration is amplified when the refrigerator door is opened, resulting in a loudspeaker-like effect that amplifies the sound and provides a poor user experience. Therefore, it is necessary to reduce vibration energy as much as possible at the source of vibration to reduce overall noise. The double-layer vibration reduction technology used in the industry is often complex or rigid and cannot achieve adjustability, that is, it cannot simultaneously meet the needs of low and high frequencies. For example, two layers of springs may have different vibration reduction amplitudes, but a single mechanical method can only achieve vibration reduction in a certain frequency range. Summary of the Invention

[0003] In order to solve the technical problem that the vibration reduction structure in the prior art cannot meet the vibration reduction requirements, the present invention proposes a vibration reduction structure and a refrigerator.

[0004] The technical solution adopted in this invention is:

[0005] This invention proposes a vibration reduction structure, comprising:

[0006] Chassis, wherein a limiting sleeve is provided on the chassis;

[0007] The foot pad is connected to the base of the vibration component at the top and installed in the limiting sleeve of the chassis at the bottom, with a gap between the foot pad and the limiting sleeve around its perimeter.

[0008] A filling medium is used to fill the gap between the foot pad and the limiting sleeve. When heated, the medium melts or softens, thereby changing the displacement of the foot pad.

[0009] A heating device is used to heat the filling medium and change its state.

[0010] Furthermore, the outer periphery of the foot pad is provided with a wave structure to increase resistance to the filling medium.

[0011] Furthermore, the foot pad has an axially continuous hollow structure.

[0012] Furthermore, the wall thickness of the hollow portion at the bottom of the foot pad is L6, and the wall thickness of the hollow portion in the middle is L5. The value of L5 ranges from 1 / 6 to 1 / 2 of the outer diameter of the foot pad, and the ratio of L5 / L6 ranges from 1.8 to 2.2.

[0013] Preferably, the limiting sleeve is a metal sleeve, and an electric heating wire of the heating device is wound around the outer surface of the metal sleeve.

[0014] The vibrating component is the compressor, and the vibration damping structure also includes a controller. When the operating frequency of the compressor is greater than the preset frequency, the controller controls the heating device to turn on in order to change the state of the filling medium.

[0015] Furthermore, when the compressor's operating frequency is greater than the second preset frequency but less than the preset frequency, the controller controls the heating device to turn on intermittently, so that the filling medium is in a semi-melted and semi-solidified state.

[0016] Furthermore, it also includes fasteners mounted on the chassis to prevent the foot pads from detaching from the limiting sleeves. The bottom of the fasteners is fixedly connected to the chassis, and the top is fastened to the foot pads to restrict the upward movement of the foot pads.

[0017] Furthermore, a fastener simultaneously restricts the foot pads connecting all compressor base feet on one side of the compressor.

[0018] The present invention also proposes a refrigerator, including the compressor vibration damping structure as described above.

[0019] Compared with existing technologies, this invention provides a novel compressor vibration damping structure, which includes a chassis, feet, fasteners, and a heating device. By using a specific filling medium and heating device, a dual vibration damping effect is achieved during both low-frequency and high-frequency compressor operation. During low-frequency compressor operation, the filling medium remains solid, effectively reducing vibration transmission by limiting the displacement of the feet. During high-frequency compressor operation, the heating device melts or softens the filling medium, increasing the range of motion of the feet and further reducing the transmitted energy of vibration. Furthermore, the hollow structure and specific geometric parameters of the feet, along with the intermittent control of the heating device, result in superior vibration damping performance. This design effectively reduces the overall vibration and noise of the refrigerator, improving the user experience. Simultaneously, during handling and transportation of the refrigerator, the solidified state of the filling medium limits the movement of the compressor feet, preventing vibration-induced collisions and deformation. Therefore, the compressor vibration damping structure of this invention has broad application prospects in the refrigerator industry. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a compressor vibration reduction structure in the prior art;

[0022] Figure 2 for Figure 1 Cross-sectional view of the rear side;

[0023] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0024] Figure 4 This is a simulated transmission diagram of noise when a refrigerator door is opened in the prior art;

[0025] Figure 5 This is a schematic diagram of the structure in an embodiment of the present invention;

[0026] Figure 6 for Figure 5 A cross-sectional view of a partially enlarged section;

[0027] Figure 7 This is a schematic diagram of the structure of the filling medium melting or softening when heated in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the solidification structure of the filling medium in an embodiment of the present invention;

[0029] 1. Compressor; 11. Compressor base;

[0030] 2. Bolts;

[0031] 3. Bushing;

[0032] 4. Foot pads;

[0033] 5. Chassis;

[0034] 51. Limiting sleeve;

[0035] 6. Box body;

[0036] 7. Refrigerator door;

[0037] 8. Fasteners;

[0038] 15. Electric heating lead wire;

[0039] 10. Filling medium. Detailed Implementation

[0040] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0041] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0042] like Figure 1 As shown, a typical refrigerator compressor consists of a compressor base fitted into a vibration-damping rubber block, and is secured by bolts 2 tightening the intermediate bushing 3. Figure 2 This is a cross-sectional view after tightening. It shows that after bolt 2 tightens bushing 3, the gap between foot pad 4 and compressor base is small. At low speeds, such as below 70Hz, the compressor vibration energy is small, and the overall vibration is not significant. However, as the speed increases and the deep-freeze function is activated, such as at 90-110Hz, the refrigerator compressor vibration amplifies. The compressor mainly produces lateral and vertical vibrations. Figure 3 The X and Y sides are shown as squares. At high speeds, compressor vibration increases the reciprocating vibration of compressor base 11 in the X direction. Compressor base 11 presses against the foot pad, and the vibration is damped by the reciprocating deformation of the foot pad thickness L1. However, L1 is limited by the size of the intermediate bushing and bolt diameter, so it is relatively small. The energy is transferred to the intermediate bushing and bolt, and then to the refrigerator chassis, as shown. Figure 3 The small arrow indicates the transmission path. Because the refrigerator chassis and outer shell are connected, a small amount of energy is transmitted through the shell to the cavity 6. When the refrigerator door 7 is opened, this energy easily amplifies like a horn, producing a buzzing sound, increasing the noise level, and resulting in poor sound quality. Figure 4Here, the metal compressor base 11 and intermediate bushing, the impact of the bolts in the X direction generates the first noise source, and the noise is transmitted downwards in the Y direction through the chassis assembly to the cavity housing 6, which is the second noise source. The cavity housing 6 expands outwards, becoming the third noise source. Among them, the first and third noise sources are the largest. To solve this problem, one approach is to reduce the diameter of the intermediate bolts and bushings to increase the gap, but this would result in the bolt diameter being too small, the tightening force and strength insufficient, and the bolts being prone to breakage (during transportation). Another approach is to increase the diameter of the compressor base to increase the gap, but the compressor base is a universal hole, and increasing it would require adjusting all the production tooling, resulting in excessive investment costs. Moreover, increasing the gap increases the degree of freedom, making it impossible to guarantee that even if the compressor shifts in one direction, the gap of a certain base will still be too small, and vibration will still occur, failing to completely solve the problem. This invention aims to overcome this problem and provide a novel compressor vibration reduction structure that effectively reduces vibration to meet the stability and low noise requirements of refrigerators at different operating frequencies. This structure can effectively suppress both low-frequency and high-frequency vibrations while the refrigerator compressor is running, providing a better user experience. By using a specific foot pad mounting structure and heating device, the stability and efficiency of the vibration damping structure can be increased when the compressor is running at high speed.

[0043] like Figure 5 , 6 As shown in Figure 7, this invention proposes a vibration damping structure, specifically a compressor vibration damping structure, including a chassis 5, foot pads 4, fasteners 8, and a heating device. The chassis 5 is the foundation of the entire vibration damping structure, on which multiple limiting sleeves 51 are mounted. The foot pads 4 are connected to the compressor base 11 (i.e., the base of the vibrating component) and are installed within the limiting sleeves of the chassis, with a certain gap between the foot pads 4 and the limiting sleeves 51. These gaps are filled with a specific filling medium 10. The fasteners 8 are mounted on the chassis 5 to prevent the foot pads 4 from detaching from the limiting sleeves 51. During low-frequency operation of the compressor, the filling medium 10 is not heated and remains solid between the foot pads 4 and the limiting sleeves 51, limiting the lateral displacement of the foot pads 4. Figure 7 , 8 As shown, when the compressor 1 is running at high frequency, the filling medium 10 is heated by a heating device, causing it to melt or soften from a solid state. This allows the foot pad 4 to move within the gap between itself and the limiting sleeve 51, increasing the clearance between the compressor foot pad and the limiting sleeve. This increases the actual displacement, eliminating noise from metal-to-metal collisions, thus reducing transmitted vibration energy at the source and lowering the overall noise of the refrigerator while improving sound quality. Furthermore, during refrigerator handling and transportation, the solidified filling medium limits the movement of the compressor foot pad, preventing problems such as excessive displacement leading to drops, collisions, or deformation.

[0044] In a specific embodiment, the filling medium 10 can be a phase change wax, which melts at approximately 60°C. The filling medium can also be a soft damping material that softens when heated.

[0045] In a specific embodiment, the foot pad 4 is made of rubber and is cylindrical with an axial through-hole design, making its interior hollow. This further increases its deformation and elasticity, and the hollow structure allows it to better adapt to different operating conditions during vibration reduction. This method, which eliminates the need for intermediate bolt fastening, results in low overall vibration energy during low-frequency compressor operation. The heating wire of the heating device is not energized, and the phase change wax filling between the limiting sleeve 51 and the foot pad 4 is solid, limiting the compressor foot pad in the horizontal direction, i.e., the X direction. At this time, the compressor vibration is mainly absorbed and damped by the reciprocating deformation of the rubber of the foot pad in the horizontal X direction and the vertical Y direction, achieving a damping effect and thus isolating the path transmitted to the front of the refrigerator body through the chassis.

[0046] Specifically, the axially continuous hollow portion of the foot pad 4 is divided into several sections. The wall thickness of the bottom hollow portion of the foot pad 4 is L6, and the wall thickness of the middle inner hollow portion of the foot pad 4 is L5. The value of L5 ranges from 1 / 6 to 1 / 2 of the outer diameter L4 of the foot pad, preferably 1 / 3. The ratio of L5 / L6 ranges from 1.8 to 2.2, preferably 2. If L5 is too small, the load-bearing capacity will be insufficient; if L5 is too large, the internal hollow space will be too small, which is not conducive to the attenuation of deformation and vibration in the X direction. If L6 is too large, more energy will be transmitted to the chassis assembly in the Y direction, but if it is too small, it will not be able to support the structure and will collapse. For the refrigerator compressor, an L5 / L6 ratio of 2 is more effective for vibration attenuation in the Y direction (vertical direction).

[0047] When the compressor activates its deep-freeze function, it operates at a high frequency, such as 100Hz, equivalent to 6000 RPM. This increases overall vibration energy. At this point, deformation of the foot pads alone is insufficient to effectively reduce vibration, which is easily transmitted to the front of the compressor housing. This increases noise levels or a buzzing sound when the door is opened. The controller then activates the heating element of the heating device, heating the limiting sleeve. The phase change wax between the limiting sleeve and the foot pad melts at a certain temperature (e.g., 60°C), or the soft damping material softens upon heating. Taking phase change wax as an example, after melting, it becomes a liquid and viscous substance in the gap, thus no longer constraining the compressor foot pads. This increases the compressor's movement in the X direction, thereby reducing the transmitted vibration energy. Specifically... Figure 7 As shown, after the phase change wax melts, the foot pad can move within L3, with a range of motion of L2. Only the limiting sleeve restricts movement in one direction. Even if the foot pad vibrates and approaches a certain circumference of the limiting sleeve, there will be no reciprocating impact between the two metal parts after being restricted in the X direction. The vibration damping rate is greatly improved, reducing the vibration source of noise at its source. Furthermore, the melted phase change wax and soft damping can partially absorb the vibration energy of the compressor's small displacements. When the electric heating wire stops, the temperature drops, the phase change wax solidifies, and the compressor is re-limited, as shown... Figure 8The range within which the foot pads and compressor can vibrate and reciprocate is shortened to the L4 interval. This limited situation is suitable for normal speed and refrigerator handling.

[0048] In addition to heating and stopping states, the heating element of the heating device can also have its heating time adjusted by the controller based on the operating frequency (speed). When the compressor's operating frequency is greater than a second preset frequency but less than a preset frequency, the heating element is controlled to heat intermittently. For example, when the compressor's operating frequency is 70Hz, the heating element heats intermittently, and the phase change wax switches between melting and semi-solid states, resulting in different vibration damping rates and improved sound quality.

[0049] Furthermore, the outer periphery of the foot pad 4 is provided with a wave structure. These wave structures can increase the resistance with the filling medium 10. When the filling medium 10 melts, the compressor vibrates in the X direction (lateral direction) and generates a small displacement. The foot pad 4 pushes the liquid phase change wax to transfer energy to the limiting sleeve. This wave-shaped rubber surface design increases the resistance and can effectively absorb some energy compared to the smooth outer surface rubber foot pad method.

[0050] In a specific embodiment, the limiting sleeve 51 is a metal sleeve, preferably a circular aluminum sleeve. The outer surface of the limiting sleeve is wrapped with an electric heating wire of a heating device. The electric heating wire is connected through an electric heating lead 15. The heating device is an electric heating device with an electric heating wire. After the heating device is turned on, the electric heating wire directly heats the limiting sleeve 51. The heat is transferred to the filling medium through the limiting sleeve 51, causing the filling medium to melt or soften.

[0051] In other embodiments, the limiting sleeve 51 is circular, and the inner surface of the limiting sleeve 51 is provided with an electric heating wire of the heating device. That is, the heating device is an electric heating device with an electric heating wire. After the heating device is turned on, the electric heating wire directly heats the filling medium, causing the filling medium to melt or soften.

[0052] Specifically, the bottom of the fastener 8 is fixedly connected to the chassis 5, and the upper part is fastened to the foot pad 4 to restrict the upward movement of the foot pad 4, thus preventing the foot pad 4 from coming out of the limiting sleeve of the chassis. The fastener 8 is a plate bent into a Z-shape, and its bottom folded edge is fixedly connected to the chassis by bolts. The top folded edge has a circular sleeve hole, and the top of the foot pad 4 has a protruding post. The top folded edge directly fits onto the protruding post on the top of the foot pad, restricting the foot pad. Since the fastener and the compressor base are parallel and have a gap between them so they do not touch, and only one side of the metal and rubber foot pads touch, the vibration of the compressor base is not directly transmitted through the fastener.

[0053] In a specific embodiment, two compressor feet 11 extend from each side of the compressor 1, for a total of four compressor feet. Each compressor foot is fitted with a foot pad 4. Four limiting sleeves are provided on the chassis, corresponding to the four foot pads. During installation, the two foot pads on one side of the compressor are fixed in place by a fastener. This improves the stability of the structure while reducing the installation process.

[0054] In a specific embodiment, the chassis 5 is provided with a plurality of circular grooves for installing the limiting sleeve. The limiting sleeve can be fixed to the chassis by bolts or directly snapped to the chassis by snapping, both of which are within the protection scope of the present invention.

[0055] The present invention also proposes a refrigerator, comprising: a refrigerator body, a compressor disposed at the bottom of the body, and the aforementioned compressor vibration damping structure.

[0056] Specifically, the refrigerator can be a refrigerator with a wide-range compressor and a deep-freezing function.

[0057] This invention proposes an innovative compressor vibration reduction structure, comprising a chassis, feet, fasteners, and a heating device. By using a specific filling medium and heating device, a dual vibration reduction effect is achieved during both low-frequency and high-frequency compressor operation. During low-frequency compressor operation, the filling medium remains solid, effectively reducing vibration transmission by limiting the displacement of the feet. During high-frequency compressor operation, the heating device melts or softens the filling medium, increasing the range of motion of the feet and further reducing the transmitted energy of vibration. Furthermore, the hollow structure and specific geometric parameters of the feet, along with the intermittent control of the heating device, result in superior vibration reduction. This design effectively reduces the overall vibration and noise of the refrigerator, improving the user experience. Simultaneously, during handling and transportation of the refrigerator, the solidified state of the filling medium limits the movement of the compressor feet, preventing vibration-induced collisions and deformation. Therefore, the compressor vibration reduction structure of this invention has broad application prospects in the refrigerator industry.

[0058] It should be noted that the terminology used above is for describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0059] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0060] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0061] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0062] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vibration damping structure, characterized in that, include: Chassis, wherein a limiting sleeve is provided on the chassis; The foot pad is connected to the base of the vibration component at its upper part and is installed in the limiting sleeve of the chassis, with a gap left between the foot pad and the limiting sleeve around its perimeter. A filling medium is used to fill the gap between the foot pad and the limiting sleeve. When heated, the medium melts or softens, thereby changing the displacement of the foot pad. A heating device is used to heat the filling medium and change its state. Fasteners installed on the chassis are used to prevent the foot pads from coming off the limiting sleeves.

2. The vibration reduction structure as described in claim 1, characterized in that, The outer periphery of the foot pad is provided with a wave structure to increase resistance to the filling medium.

3. The vibration reduction structure as described in claim 1, characterized in that, The foot pad has an axially continuous hollow structure.

4. The vibration reduction structure as described in claim 3, characterized in that, The wall thickness of the hollow part at the bottom of the foot pad is L6, and the wall thickness of the hollow part in the middle is L5. The value of L5 ranges from 1 / 6 to 1 / 2 of the outer diameter L4 of the foot pad, and the ratio of L5 / L6 ranges from 1.8 to 2.

2.

5. The vibration reduction structure as described in claim 1, characterized in that, The limiting sleeve is a metal sleeve, and the outer surface of the limiting sleeve is wrapped with the electric heating wire of the heating device.

6. The vibration reduction structure as described in claim 1, characterized in that, The vibrating component is a compressor.

7. The vibration reduction structure as described in claim 6, characterized in that, It also includes a controller, which controls the heating device to turn on and heat the filling medium when the operating frequency of the compressor is greater than a preset frequency.

8. The vibration reduction structure as described in claim 7, characterized in that, When the operating frequency of the compressor is greater than the second preset frequency but less than the preset frequency, the controller controls the heating device to be turned on intermittently so that the filling medium is in a semi-melted and semi-solidified state.

9. The vibration reduction structure as described in claim 1, characterized in that, The bottom of the fastener is fixedly connected to the chassis, and the upper part is fastened to the foot pad to restrict the foot pad from moving upward.

10. A refrigerator, characterized in that, Including the vibration reduction structure as described in any one of claims 1 to 9.

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